Numerical evaluation of 3D passive earth pressure coefficients for retaining wall subjected to translation

Benmebarek, Sadok; Khelifa, T.; Benmebarek, Naïma; Kastner, Richard

doi:10.1016/j.compgeo.2007.01.008

Cited by 32 publications

(22 citation statements)

References 7 publications

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“…The explicit Lagrangian calculation scheme and the mixed-discretization zoning technique (Cundall PA. [9]) used in FLAC3D ensure that plastic failure and flow are modelled very accurately (Benmebarek et al [10]). …”

Section: Numerical Modeling Proceduresmentioning

confidence: 99%

“…This robust model widely known and used in the simulations of geotechnical structures was selected and it has the advantage of requiring few parameters whose meaning is well represented, requiring the specification of a shear modulus G=60 MPa , a bulk modulus K=22MPa , a unit weight γ = 20 kN/m 3 , a friction angle φ, and an angle of dilation ψ [10]. It is noted that passive and active earth pressure coefficients are independent from elastic and weight soil parameters.…”

Section: Numerical Modeling Proceduresmentioning

confidence: 99%

“…The domain used for the analysis is sketched in Fig. 3, together with its dimensions and axis [10]. Fig.…”

Section: Numerical Modeling Proceduresmentioning

confidence: 99%

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Dilation effect on 3D Passive Earth Pressure Coefficients for Retaining Wall

Khelifa¹,

Benmebarek²

2014

A P J Eng Sci

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The 2D passive earth pressures acting on rigid retaining walls problem has been widely treated in the literature using different approaches (limit equilibrium, limit analysis, slip line and numerical computation), however, the 3D passive earth pressures problem has received less attention. This paper is concerned with the numerical study of 3D passive earth pressures induced by the translation of a rigid rough retaining wall for associated and non-associated soils. Using the explicit finite difference code FLAC3D, the increase of the passive earth pressures due to the decrease of the wall breadth is investigated. The results given by the present numerical analysis are compared with other investigation. The influence of the angle of dilation on the coefficients is also studied.

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Section: Numerical Modeling Proceduresmentioning

confidence: 99%

Section: Numerical Modeling Proceduresmentioning

confidence: 99%

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Dilation effect on 3D Passive Earth Pressure Coefficients for Retaining Wall

Khelifa¹,

Benmebarek²

2014

A P J Eng Sci

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“…Once the waste rock piles up in the dumps, the scope of valid influence and some key factors as well as the quantitative relations among them are not clearly defined. To discover the according functional relationship, FLAC 3D software is used herein to simulate dynamic loading process in outer dumps and record data concerning surface displacement (Benmebarek et al, 2008;Xu et al, 2011), which are then used to draw a regular pattern by means of mathematical treatment.…”

Section: Horizontal Displacement Calculation Models In Loading Processmentioning

confidence: 99%

Research on the Influence of Excavation and Loading on Z-Direction Displacement in Surrounding Soil Mass

Li¹,

Zhou²,

Han³

et al. 2014

Archives of Mining Sciences

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To probe into the pattern in which the excavation and loading process have on such factors as stress and displacement in neighboring regions of deep open pits, a mechanical unloading model in coal mining process and another model for the loading process are set up respectively. Besides, FLAC 3D software is used to simulate dynamic excavating and loading process in open pits and record such data as the unbalanced stress, unloading strength and displacement fluctuations, which further serve as basis for studying the functional relationship about different mining heights and scope of influence using fitting method. The research results indicate that the unloading strength enhances with increasing mining depth in a linear fashion. In addition, a noticeable displacement circle takes shape around the stope, which would also extends with growing mining depth. As to waste loading, it brings about large-scale surface subsidence in neighboring regions, which follows a logarithm function convergence pattern with the distance away from the dump border. Under combined effects of excavation and loading, the value of the soil mass displacement would increase with growing mining depth and loading height. Specifically, the soil displacement at a distance of 100 m away from the stope border (around 200 m away from the outer dump border) is abnormally significant and it further develops at a rate of 0.0228 mm/h. Keywords: excavat ion, loading, unloading strength, stress, region displacement, displacement circle W celu zbadania zależności pomiędzy procesami wydobycia i składowania urobku a takimi czynnikami jak naprężenia i przemieszczenia w sąsiadujących partiach głębokich wyrobisk odkrywkowych, wykorzystano model mechaniczny procesu urabiania węgla oraz model procesu jego składowania. Wykorzystano oprogramowanie FLAC 3D do symulacji procesów wydobycia i składowania w wyrobiskach odkrywkowych, zapisano odpowiednie dane: niezrównoważone naprężenia, wytrzymałość w trakcie odciążania oraz wahania przemieszczeń gruntu, które wykorzystane zostały następnie jako podstawa do badania funkcjonalnych zależności pomiędzy wysokością poziomu wydobycia a skalą oddziaływania, przy użyciu odpowiednich metod dopasowania. Wyniki badań wskazują, że wytrzymałość w trakcie odciążania wzrasta liniowo z głębokością. Ponadto, zarejestrowano wyraźny kołowy przebieg przemieszczenia wokół zbocza, który także rośnie z głębokością. W przypadku obciążenia wskutek urobku odpadowego, zanotowano obniżenia terenu o dużym zasięgu o przebiegu konwergencji opisanym funkcją logarytmiczną odległości od miejsca składowania urobku odpadowego. W przypadku wystąpienia połączonych efektów wydobycia i składowania, wielkość przemieszczeń mas gruntu wzrastać będzie wraz z głębokością prowadzenia prac i wysokością składowania. Przemieszczenie gruntu w odległości 100 m od brzegu wyrobiska (ok. 200 od zewnętrznej granicy składowiska) okazuje się niepokojąco duże i postępujące w tempie 0.0228 mm/h).Słowa kluczowe: wydobycie, składowanie, wytrzymałość gruntu w trakcie składowania,...

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“…Theoretical earth pressure problems are generally solved using the limit equilibrium method, the slip line method or the upper or lower bound limit analysis. Recent work includes [6,7], but these studies only concentrate on the soil, considering the retaining structure as rigid.…”

Section: Introductionmentioning

confidence: 99%

2D modelling of a dry joint masonry wall retaining a pulverulent backfill

Colas¹,

Morel²,

Garnier³

2010

Num Anal Meth Geomechanics

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International audienceThis work focuses on an analysis of dry joint retaining structures based on yield design theory: the stability of the masonry is assessed using rigid block and shear failure mechanisms in the wall and its backfill. An application of this simulation on 2D scale-down brick and wood models is then addressed, showing close agreement between theoretical predictions and experimental results. Further development on this work, including application of this theory on dry-stone retaining walls, is discussed as a conclusion

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Numerical evaluation of 3D passive earth pressure coefficients for retaining wall subjected to translation

Cited by 32 publications

References 7 publications

Dilation effect on 3D Passive Earth Pressure Coefficients for Retaining Wall

Dilation effect on 3D Passive Earth Pressure Coefficients for Retaining Wall

Research on the Influence of Excavation and Loading on Z-Direction Displacement in Surrounding Soil Mass

2D modelling of a dry joint masonry wall retaining a pulverulent backfill

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